William gardner



(No Model.)

W. GARDNER.

VALVE.

' No. 252,094 Patented-Jan. 10,1882..

nesses: Izwn'or.- 4M WmGardne-n l l I Wmcgm Mr/@gy NITED STATES PATENT OFFICE.

WILLIAM GARDNER, OF TROY, NEW YORK, ASSIGNOR OF ONE-HALF TO MILTON O. JONES,

OF SAME PLAGE.

VALVE.

SPECIFICATION forming part of Letters Patent No. 252,094, dated January 10, 1882.

Application tiled August 1, 1881. (No model.)

To all whom tt may concern: A

Beit known that I, WILLIAM GARDNER, of Troy, in the county of Rensselaer and 'State of New York, have invented certain new and useful Improvements in Valves, of which the following is a specification.

My invention relates to improvements in metallic disk valves of the class commonly used for steam and water stop-valves; and the object of my improvements is to afford facilities for grinding the disks of such valves to their seats while they are retained by their operating mechanisms; and to this end my invention consists in providing the disk of the valve with a slot or other suitable appliance for receiving a detachable grinding handle r tool, and in providing the screw-stem of the valve with a suitable opening that leads directly to the slot in the disk in such manner that the grindingtool will be guided into said slot, the opening for receiving such tool heilig adapted at its outer end to receive a screw-plug or other stopper forthe purpose ol' closing it against any escape of lluid at that point.

I'u the accompanying drawings, which form part of this specification, andY to which ret'erence is herein made, Figure l is a longitudinal section of a globe-valve containing myim provenients, and Fig. 2am elevation of the lower end of the detachable grinding-tool.

As illustrated in the drawings, A is the valve-casing, which may be made of any size and form best suited to the purpose for which it is required. A valve-seat, a, is formed in said easing for receiving a diskvalve.

Bis ametallicdisk-valve, fitted hya ground joint7 to the seat a in the valve-casing. Said valve is attached, by means of an ordinary yielding joint, to the screw-stem b. A slot, b', or other suitable device, is formed in or on the top of the valve B, for receiving the point of a detachable grinding-tool.

O is an opening formed through the axial line ot' the screw-stem b to coincide with the center of the valve B, so that a grinding-tool similar to the one shown in Fig. 3 may be thereby guided into the slot b. The outer end ot' the opening G is adapted to receive a stopper, which I preferably make in the form of a screw-plug, D, whereby said opening is hermetically sealed to prevent the escape of any steam or water which otherwise might leak therethrough.

The grinding-tool shown in Fig. 3 consists of a cylindrical stem, E, that tits easily in the opening O, and is provided with a tiattened end, c; but instead of the latter it may be Vformed to tit into or onto any device with which the upper part of the valve B is provided for receiving such tool. The said tool may be provided with any kind of a handle that is best suited to imparting to it a rotary motion; but from preference I use it in the form of a bit-stock.

To grind the valve B to the valve-seat the plug D is removed, and, after applying any suitable abrading material to the valve, the grinding-tool E is inserted in the opening U until the point E engages in the slot b', then a few rotatory or vibratory movements areimpartedto the valve by means of said tool to producea tight joint between the valve and.

its seat, and as this operation is performed while all of the working parts are in the Ipositions where they perform their several l'unctions the work will be rapidly accomplished, and with such accuracy as to avoid any liability of the valve to be thrown out ot' coincidence with its sat, which defect is a trequent occurrence when the valve is 'ground without such a steadiment.

I am aware that globe-valves have heretofore been constructed With'a hollow screwstein containing a secondary stem that eX- tended through `the hollow stem and was provided at its lower end with a socket that served as a guide for the valve; but both tstems have no connection to the. valve for the purpose of lifting it from its seat. Therefore I do not wish to be understood as claiming a hollow screw-stem or the other parts ot a valve, as hereinbefore described, otherwise than in the combination specified in the t'ollowing claim.

l I claim as my invention- The combination, with a valve, B, provided with a slot, b', or other similar device for rc ceiving a detachable grinding-tool, of the stem b,jointed to the valve B and provided at its axial center with an opening, G,`for the admission of a detachable grinding-l tool, as herein described, the opening C being adapted to receive a stopper, D, as and for the purpose herein specified.

VWitnesses: WILLIAM GARDNER.

M. C. JONES, WM. H. LowV IOO 

